mlld
Version:
mlld: llm scripting language
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type { Variable } from '@core/types/variable';\nimport {\n createSimpleTextVariable,\n createStructuredValueVariable,\n createObjectVariable,\n createArrayVariable,\n createPrimitiveVariable,\n type VariableFactoryInitOptions\n} from '@core/types/variable/VariableFactories';\nimport { isStructuredValue } from '../utils/structured-value';\nimport { materializeExpressionValue } from './expression-provenance';\n\nexport interface ParameterFactoryOptions {\n name: string;\n value: unknown;\n stringValue?: string;\n originalVariable?: Variable;\n allowOriginalReuse?: boolean;\n metadataFactory?: (value: unknown) => VariableFactoryInitOptions | undefined;\n origin: 'exec-param' | 'pipeline' | 'directive';\n closureEnv?: Map<string, Variable>;\n}\n\nexport function createParameterVariable(\n options: ParameterFactoryOptions\n): Variable | undefined {\n const {\n name,\n value,\n stringValue,\n originalVariable,\n allowOriginalReuse,\n metadataFactory\n } = options;\n\n if (originalVariable && allowOriginalReuse) {\n return {\n ...originalVariable,\n name,\n mx: { ...(originalVariable.mx ?? {}) },\n internal: {\n ...(originalVariable.internal ?? {}),\n isSystem: true,\n isParameter: true\n }\n };\n }\n\n const preservedValue = value !== undefined ? value : stringValue;\n if (preservedValue === undefined) {\n return undefined;\n }\n\n const metadata = metadataFactory ? metadataFactory(preservedValue) : undefined;\n\n if (isStructuredValue(preservedValue)) {\n return createStructuredValueVariable(\n name,\n preservedValue,\n {\n directive: 'var',\n syntax: 'reference',\n hasInterpolation: false,\n isMultiLine: false\n },\n metadata\n );\n }\n\n if (\n preservedValue !== null &&\n typeof preservedValue === 'object' &&\n !Array.isArray(preservedValue)\n ) {\n return createObjectVariable(\n name,\n preservedValue,\n true,\n {\n directive: 'var',\n syntax: 'object',\n hasInterpolation: false,\n isMultiLine: false\n },\n metadata\n );\n }\n\n if (Array.isArray(preservedValue)) {\n return createArrayVariable(\n name,\n preservedValue,\n true,\n {\n directive: 'var',\n syntax: 'array',\n hasInterpolation: false,\n isMultiLine: false\n },\n metadata\n );\n }\n\n if (\n typeof preservedValue === 'number' ||\n typeof preservedValue === 'boolean' ||\n preservedValue === null\n ) {\n return createPrimitiveVariable(\n name,\n preservedValue,\n {\n directive: 'var',\n syntax: 'literal',\n hasInterpolation: false,\n isMultiLine: false\n },\n metadata\n );\n }\n\n return createSimpleTextVariable(\n name,\n String(preservedValue),\n {\n directive: 'var',\n syntax: 'quoted',\n hasInterpolation: false,\n isMultiLine: false\n },\n metadata\n );\n}\n\nexport interface PipelineParameterFactoryOptions extends ParameterFactoryOptions {\n pipelineStage?: number;\n isPipelineInput?: boolean;\n}\n\nexport function createPipelineParameterVariable(\n options: PipelineParameterFactoryOptions\n): Variable | undefined {\n const {\n name,\n value,\n stringValue,\n originalVariable,\n allowOriginalReuse,\n metadataFactory,\n pipelineStage,\n isPipelineInput\n } = options;\n\n if (originalVariable && allowOriginalReuse) {\n return {\n ...originalVariable,\n name,\n mx: { ...(originalVariable.mx ?? {}) },\n internal: {\n ...(originalVariable.internal ?? {}),\n isSystem: true,\n isParameter: true,\n isPipelineParameter: Boolean(isPipelineInput),\n pipelineStage\n }\n };\n }\n\n const provenanceVariable =\n materializeExpressionValue(value, { name }) ??\n (stringValue !== undefined ? materializeExpressionValue(stringValue, { name }) : undefined);\n if (provenanceVariable) {\n return {\n ...provenanceVariable,\n internal: {\n ...(provenanceVariable.internal ?? {}),\n isSystem: true,\n isParameter: true,\n isPipelineParameter: Boolean(isPipelineInput),\n pipelineStage\n }\n };\n }\n\n const resolvedMetadataFactory = (val: unknown) => {\n const base = metadataFactory ? metadataFactory(val) : undefined;\n return {\n ...base,\n internal: {\n ...(base?.internal ?? {}),\n isParameter: true,\n isPipelineParameter: Boolean(isPipelineInput),\n pipelineStage\n }\n };\n };\n\n return createParameterVariable({\n ...options,\n metadataFactory: resolvedMetadataFactory,\n origin: options.origin ?? 'pipeline'\n });\n}\n","import type { StructuredValueType } from './structured-value';\nimport { isStructuredValue } from './structured-value';\n\nexport interface TransformerNormalization {\n value: unknown;\n options?: {\n type?: StructuredValueType;\n text?: string;\n };\n}\n\nfunction inferStructuredType(value: unknown): StructuredValueType | undefined {\n if (Array.isArray(value)) {\n return 'array';\n }\n if (value !== null && typeof value === 'object') {\n return 'object';\n }\n return 'json';\n}\n\nfunction safeStringify(value: unknown): string {\n try {\n return JSON.stringify(value, null, 2);\n } catch {\n return String(value ?? '');\n }\n}\n\nexport function normalizeTransformerResult(\n transformerName: string | undefined,\n result: unknown\n): TransformerNormalization {\n if (!transformerName) {\n return { value: result };\n }\n\n const normalizedName = transformerName.toLowerCase();\n\n if (normalizedName === 'json') {\n if (isStructuredValue(result)) {\n return { value: result };\n }\n\n if (typeof result === 'string') {\n const trimmed = result.trim();\n if (trimmed) {\n try {\n const parsed = JSON.parse(result);\n const type = inferStructuredType(parsed);\n return {\n value: parsed,\n options: {\n type,\n text: result\n }\n };\n } catch {\n // Ignore parse failure, fall through to legacy behaviour\n }\n }\n return { value: result };\n }\n\n if (result !== null && typeof result === 'object') {\n return {\n value: result,\n options: {\n type: inferStructuredType(result),\n text: safeStringify(result)\n }\n };\n }\n }\n\n return { value: result };\n}\n","import { GuardError } from '@core/errors/GuardError';\nimport type { GuardErrorDetails } from '@core/errors/GuardError';\nimport type { Environment } from '../env/Environment';\nimport type { EvalResult } from '../core/interpreter';\nimport type { WhenExpressionNode } from '@core/types/when';\nimport type { GuardContextSnapshot } from '../env/ContextManager';\nimport { normalizeWhenShowEffect } from '../utils/structured-value';\nimport { isVariable } from '../utils/variable-resolution';\nimport type { Variable } from '@core/types/variable';\nimport { materializeExpressionValue } from '@core/types/provenance/ExpressionProvenance';\nimport { materializeDisplayValue } from '../utils/display-materialization';\n\nexport async function handleExecGuardDenial(\n error: unknown,\n options: {\n execEnv: Environment;\n env: Environment;\n whenExprNode: WhenExpressionNode;\n }\n): Promise<EvalResult | null> {\n if (!(error instanceof GuardError) || error.decision !== 'deny') {\n return null;\n }\n\n const details = (error.details ?? {}) as GuardErrorDetails;\n const reason = error.reason ?? details.reason ?? error.message ?? 'Guard denied operation';\n const guardContext = details.guardContext as GuardContextSnapshot | undefined;\n const guardInput = details.guardInput;\n const deniedContext = {\n denied: true,\n reason,\n guardName: details.guardName ?? null,\n guardFilter: details.guardFilter ?? null\n };\n\n const { evaluateWhenExpression } = await import('./when-expression');\n const warning = formatGuardWarning(reason, deniedContext.guardFilter, deniedContext.guardName);\n const materializedWarning = materializeDisplayValue(`${warning}\\n`, undefined, warning);\n options.env.emitEffect('stderr', materializedWarning.text);\n if (materializedWarning.descriptor) {\n options.env.recordSecurityDescriptor(materializedWarning.descriptor);\n }\n maybeInjectGuardInputVariable(options.execEnv, guardInput ?? guardContext?.input);\n // Populate @output for after-guard denied handlers when available\n if (guardContext?.output !== undefined) {\n const existingOutput = options.execEnv.getVariable?.('output');\n if (!existingOutput && isVariable(guardContext.output as Variable)) {\n const outVar = guardContext.output as Variable;\n const clonedOutput: Variable = {\n ...outVar,\n name: 'output',\n mx: { ...(outVar.mx ?? {}) },\n internal: {\n ...(outVar.internal ?? {}),\n isSystem: true,\n isParameter: true\n }\n };\n options.execEnv.setParameterVariable('output', clonedOutput);\n }\n }\n const runHandlers = async () =>\n options.execEnv.withDeniedContext(deniedContext, async () =>\n evaluateWhenExpression(options.whenExprNode, options.execEnv, undefined, { denyMode: true })\n );\n const whenResult = guardContext\n ? await options.execEnv.withGuardContext(guardContext, runHandlers)\n : await runHandlers();\n\n const normalization = normalizeWhenShowEffect(whenResult.value);\n const normalizedResult = {\n ...whenResult,\n value: normalization.hadShowEffect ? undefined : normalization.normalized\n };\n\n if (!normalizedResult.internal?.deniedHandlerRan) {\n return null;\n }\n\n return {\n ...normalizedResult,\n stderr: warning\n };\n}\n\nfunction maybeInjectGuardInputVariable(execEnv: Environment, value: unknown) {\n if (value === undefined || value === null) {\n return;\n }\n const existingInput = execEnv.getVariable?.('input');\n if (existingInput) {\n return;\n }\n\n const variable =\n (isVariable(value as Variable) ? (value as Variable) : undefined) ??\n materializeExpressionValue(value, { name: 'input' });\n\n if (!variable) {\n return;\n }\n\n const clonedInput: Variable = {\n ...variable,\n name: 'input',\n mx: { ...(variable.mx ?? {}) },\n internal: {\n ...(variable.internal ?? {}),\n isSystem: true,\n isParameter: true\n }\n };\n\n execEnv.setParameterVariable('input', clonedInput);\n}\n\nexport function formatGuardWarning(\n reason?: string | null,\n filter?: string | null,\n guardName?: string | null\n): string {\n if (reason && reason.trim().length > 0) {\n return `[Guard Warning] ${reason}`;\n }\n const identifier = guardName ?? filter ?? 'operation';\n return `[Guard Warning] Guard for ${identifier} prevented operation due to policy violation`;\n}\n"]}